Han, Sang-Eon Covering rough set structures for a locally finite covering approximation space. (English) Zbl 1443.68193 Inf. Sci. 480, 420-437 (2019). MSC: 68U03 03E72 54A10 68U05 68U10 PDFBibTeX XMLCite \textit{S.-E. Han}, Inf. Sci. 480, 420--437 (2019; Zbl 1443.68193) Full Text: DOI
Yao, Wei; Han, Sang-Eon; Wang, Rongxin Lattice-theoretic contexts and their concept lattices via Galois ideals. (English) Zbl 1395.68258 Inf. Sci. 339, 1-18 (2016). MSC: 68T30 06A15 06D10 PDFBibTeX XMLCite \textit{W. Yao} et al., Inf. Sci. 339, 1--18 (2016; Zbl 1395.68258) Full Text: DOI
Han, Sang-Eon; Kim, In Soo; Šostak, Alexander On approximate-type systems generated by \( L\)-relations. (English) Zbl 1461.03052 Inf. Sci. 281, 8-20 (2014). MSC: 03E72 68T37 PDFBibTeX XMLCite \textit{S.-E. Han} et al., Inf. Sci. 281, 8--20 (2014; Zbl 1461.03052) Full Text: DOI
Han, Sang-Eon Comparison among digital fundamental groups and its applications. (English) Zbl 1141.55008 Inf. Sci. 178, No. 8, 2091-2104 (2008). Reviewer: Philippe Gaucher (Paris) MSC: 55Q70 52C99 55P10 68U05 PDFBibTeX XMLCite \textit{S.-E. Han}, Inf. Sci. 178, No. 8, 2091--2104 (2008; Zbl 1141.55008) Full Text: DOI
Han, Sang-Eon Equivalent \((k_{0},k_{1})\)-covering and generalized digital lifting. (English) Zbl 1128.68108 Inf. Sci. 178, No. 2, 550-561 (2008). MSC: 68U10 68R10 68U05 54B10 54C05 54H12 51D25 PDFBibTeX XMLCite \textit{S.-E. Han}, Inf. Sci. 178, No. 2, 550--561 (2008; Zbl 1128.68108) Full Text: DOI
Han, Sang-Eon The \(k\)-fundamental group of a closed \(k\)-surface. (English) Zbl 1185.68779 Inf. Sci. 177, No. 18, 3731-3748 (2007). MSC: 68U05 57M05 57M10 PDFBibTeX XMLCite \textit{S.-E. Han}, Inf. Sci. 177, No. 18, 3731--3748 (2007; Zbl 1185.68779) Full Text: DOI
Han, Sang-Eon Digital fundamental group and Euler characteristic of a connected sum of digital closed surfaces. (English) Zbl 1122.68143 Inf. Sci. 177, No. 16, 3314-3326 (2007). MSC: 68U05 57M05 PDFBibTeX XMLCite \textit{S.-E. Han}, Inf. Sci. 177, No. 16, 3314--3326 (2007; Zbl 1122.68143) Full Text: DOI
Han, Sang-Eon Connected sum of digital closed surfaces. (English) Zbl 1083.68135 Inf. Sci. 176, No. 3, 332-348 (2006). MSC: 68U05 PDFBibTeX XMLCite \textit{S.-E. Han}, Inf. Sci. 176, No. 3, 332--348 (2006; Zbl 1083.68135) Full Text: DOI
Han, Sang-Eon Minimal simple closed 18-surfaces and a topological preservation of 3D surfaces. (English) Zbl 1101.68908 Inf. Sci. 176, No. 2, 120-134 (2006). MSC: 68U05 PDFBibTeX XMLCite \textit{S.-E. Han}, Inf. Sci. 176, No. 2, 120--134 (2006; Zbl 1101.68908) Full Text: DOI
Han, Sang-Eon Non-product property of the digital fundamental group. (English) Zbl 1074.68075 Inf. Sci. 171, No. 1-3, 73-91 (2005); erratum ibid. 176, No. 2, 215-216 (2006). MSC: 68U05 68U10 PDFBibTeX XMLCite \textit{S.-E. Han}, Inf. Sci. 171, No. 1--3, 73--91 (2006; Zbl 1074.68075) Full Text: DOI